I loved Mass Effect and how it just pulled you into the story and made you care about the people on your team. I was so used to games leading me down a one way story, so I was surprised that I got to choose for once.

What this person is talking about is more on control than interaction. I consider interaction as massaging, PlayStation Home, video chat...etc. What this person is talking about is that we have control over what we do instead of being forced to do one thing.

Like for example Metal Gear Solid 4: Guns of the Patriots can be played in many different ways. That's control. With PlayStation Home you can talk to other PlayStation 3 users in a connected community. That's interaction.

So with games that have a squad for you to command is a form of control. In that very same game you can go online with co-op and use headsets, a form of interaction. The big difference here is that one is human the other is a program.

Non the less this is in interesting topic I just think this person used the wrong wording.

I also want to note a program can interaction with each other but the human always has control. So in Grand Theft Auto IV you shoot someone in the world, people will react to that in that world. Interaction is a form of communication. If a program has A.I. (Artificial Intelligence) things would be a little different and I don't mean how developers talk about A.I. in video games. More so of the Matrix creating a program that learns and thinks on its own or i, Robot.